package com.example;

/**
 * @author wangjinlong
 * @version 1.0
 * @date 2021/6/18 11:19
 */
public class Demo {
    public static void main(String[] args) {
        long num = 2;
        long num2 = num;
        num = 4;
        System.out.println(num);
        System.out.println(num2);
    }
}
